How severe is CVE-2021-3798?

CVE-2021-3798 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-3798 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3798?

CVE-2021-3798 affects Opencryptoki Project Opencryptoki. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3798?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-3798 published?

CVE-2021-3798 was published on 2022-08-23 and last updated on 2026-06-17.

CVE-2021-3798

CVE-2021-3798 is a medium-severity vulnerability in Opencryptoki Project Opencryptoki with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Opencryptoki Project Opencryptoki
Published: 2022-08-23
Last modified: 2026-06-17

Description

A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.

Frequently asked questions

What is CVE-2021-3798?: A flaw was found in openCryptoki. The openCryptoki Soft token does not check if an EC key is valid when an EC key is created via C_CreateObject, nor when C_DeriveKey is used with ECDH public data. This may allow a malicious user to extract the private key by performing an invalid curve attack.
How severe is CVE-2021-3798?: CVE-2021-3798 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-3798 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3798?: CVE-2021-3798 affects Opencryptoki Project Opencryptoki. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3798?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-3798 published?: CVE-2021-3798 was published on 2022-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:opencryptoki_project:opencryptoki:*:*:*:*:*:*:*:*

More vulnerabilities in Opencryptoki Project Opencryptoki

CVE-2026-40253 — Medium (CVSS 6.8): openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. In versions 3.26.0 and below, the BER/DER…
CVE-2026-23893 — Medium (CVSS 6.8): openCryptoki is a PKCS#11 library and provides tooling for Linux and AIX. Versions 2.3.2 and above are vulnerable to…
CVE-2026-22791 — Medium (CVSS 6.6): openCryptoki is a PKCS#11 library and tools for Linux and AIX. In 3.25.0 and 3.26.0, there is a heap buffer overflow…
CVE-2012-4455 — Medium (CVSS 6.2): openCryptoki 2.4.1 allows local users to create or set world-writable permissions on arbitrary files via a symlink…
CVE-2024-0914 — Medium (CVSS 5.9): A timing side-channel vulnerability has been discovered in the opencryptoki package while processing RSA PKCS#1 v1.5…
CVE-2012-4454 — Low (CVSS 2.9): openCryptoki before 2.4.1, when using spinlocks, allows local users to create or set world-writable permissions on…

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